Job Title: Principal Software Engineer
Location Marietta, GA
Salary Range: $160,000 - $200,000 + Bonus Eligible
Founded in 2004 with locations in Atlanta, GA, Fort Worth, TX, Denver, CO, & Huntsville, AL, Thompson Software Solutions (TSS) is a mission-driven aerospace and defense software and systems engineering company supporting the U.S. military, defense primes, and commercial space partners. We specialize in the development, integration, test, and deployment of safety & mission-critical software systems that power next-generation aircraft, defense platforms, and space technologies. Our team understands what it takes to modernize complex embedded systems while maintaining the rigor, compliance, and reliability required for mission and safety-critical environments.
As a defense-focused company of highly skilled and dedicated engineers, we take pride in solving complex technical challenges that directly impact national security and operational readiness. We partner closely with customers across the military aviation and space domains to deliver resilient, future-ready solutions with portability, sustainability, and long-term mission success in mind.
Thompson Software Solutions is seeking a Principal Software Engineer to support the development of software systems for a military aircraft platform. This is an opportunity to contribute directly to safety & mission-critical avionics and embedded capabilities that enable the performance, safety, and effectiveness of military aviation systems.
This position requires a software engineer to use a wide application of technical principles, theories, and concepts in the software field to develop, integrate, and test software products. The successful candidate will be a member of a high-performing multi-site team and must be self-motivated with a strong work ethic, time-management, and interpersonal skills. In this role, you will work independently at times on projects, at other times will be in a collaborative team environment with other software engineers, as well as other program development and deployment teams.
Basic Requirements:
●Bachelor's degree in a STEM discipline
●8+ years of C, C++, and/or Ada software development experience
●Prior SW Development and Integration experience utilizing the following communications protocols (MIL-STD-1553, ARINC 429, Ethernet)
●Prior experience writing embedded software (C, C++, and/or Ada)
●Prior experience troubleshooting/debugging software on target hardware in lab/mock-up environments
●Prior experience in avionics or defense systems development
●Prior experience using IBM DOORS to author, review, and maintain software requirements with full traceability.
●Experience with real-time operating systems (e.g. Lynx, Green Hills, Wind River)
●Ability to professionally communicate project status and collaborate on technical solutions with clients and peers
●Ability to work onsite 100%
Preferred / Additional Skills
●Master’s degree in a STEM discipline
●Experience developing embedded safety critical software in Ada
●Proficient with Linux and Windows development environments
●Proficient with Atlassian or similar tools (Confluence, JIRA, Bitbucket, etc.)
●Experience using static analysis tools (Parasoft, Coverity, SonarQube, or similar analysis tool)
●Experience with structural coverage and software test automation tools for embedded systems (e.g. VectorCAST)
●Experience with DO-178C, MIL-HDBK-516 and safety-critical software development practices
●Experience with Integrated Modular Avionics (IMA), ARINC 653 and flight software development
●Experience communicating and documenting complex technical designs
●Excellent written and verbal communication and presentation skills
●Ability to travel 10%
Sound Exciting? Get in touch today! We have very robust benefits including:
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.
At Lynx, we believe in a “software-defined everything at the edge” world, powered by trusted, mission-aligned partnerships that enable organizations to break free from the status quo and drive innovation at the speed of relevance.
As a portfolio company of OceanSound Partners, we deliver modular, open-standards-based software solutions that redefine the economics of developing, deploying, and maintaining high-assurance, mission-critical edge platforms. Designed for the most demanding environments, our secure computing solutions fuel operational excellence across aerospace, defense, automotive, medical, energy, industrial, and space applications.
Our expansion through the strategic acquisitions of Timesys, Thompson Software Solutions, and CoreAVI has broadened our technology leadership, encompassing open source and Linux-based development, certifiable safety-critical graphics and GPU compute, and AI at the edge.
At our core, we empower our customers to Seize the Edge. From integrated cloud-connected platforms leveraging the latest multicore and GPU technologies to hardened security, predictable performance, and robust reliability, Lynx enables real-time decision-making where it matters most.
Whether modernizing legacy systems or designing next-generation platforms, we partner closely to simplify complexity and unlock innovation. We deliver certifiable, safe, secure solutions aligned with your mission and operational goals, including compliance with DO-178C, ISO 26262, NIST 800-53, and more.
Join us in redefining what’s possible at the edge.
